Extent Maps

Efforts continue in the fight against Hemlock Woolly Adelgid (HWA) in and beyond Ottawa County. Surveys and treatments continue to be managed on both public and private property. The four-county quarantine on eastern hemlocks is still in effect, which means if you see trimmed hemlock branches while out for a walk, do not move them (even if there is no detectable HWA). Moving branches with needles is illegal at this time, since it can spread HWA.

Take a look at the maps below for the state-wide extent of HWA as well as a closer look at the four-county areas (north to south). 

State-wide nearly 7,000 trees, 303 acres, and 233 properties have been treated for HWA.
The most recent report in Ottawa County was discovered by a resident of Grand Haven while visiting Mulligan’s Hollow. Because of her quick reporting, the area was able to be surveyed, and the affected trees are being treated.